This paper provides an overview of the Master Thesis Project entitled “Instruments and Methods for Cultural Heritage Conservation and Valorization” conducted at the Faculty of Science and Technology, University of Urbino "Carlo Bo", Italy. The subject of our research was the medieval fortress of the Počitelj historic site in Bosnia and Herzegovina, built in a Mediterranean and oriental style over the period from the fifteenth to the eighteenth centuries. Different methodologies for survey and management using the modern IT techniques of architectural survey methodologies, with particular focus on survey using 3D data, will be presented. We will consider the questions of the analytical and theoretical set up of the modern instruments and techniques necessary for constructing the 3D metric model of the surveyed ruins of the medieval part of fortress.